Final answer:
To get the resultant of two vectors of different magnitude but in the same direction, you must add their magnitudes, keeping the direction unchanged.
Step-by-step explanation:
When two vectors of different magnitude pointing in the same direction undergo vector addition, mathematically, you must add the magnitudes of the two vectors. The sum of their magnitudes gives you the magnitude of the resultant vector. The direction of the resultant vector remains the same as the initial vectors since they are pointing in the same direction. Therefore, to get the resultant of the vector addition, the correct mathematical operation would be (a) Add. When adding two vectors of different magnitudes pointing in the same direction, you need to add them mathematically. Vector addition involves combining the magnitudes and directions of the vectors to determine the resultant vector. This process typically requires adding corresponding components of the vectors. The mathematical operation involved is addition, which means combining the magnitudes algebraically. This is essential for determining the overall effect or displacement when multiple vectors act in the same direction. Options (b) subtract, (c) multiply, and (d) divide are not applicable to vector addition when the vectors are in the same direction; addition is the correct mathematical operation.